12665138201 has 2 divisors, whose sum is σ = 12665138202. Its totient is φ = 12665138200.

The previous prime is 12665138183. The next prime is 12665138219. The reversal of 12665138201 is 10283156621.

It is a balanced prime because it is at equal distance from previous prime (12665138183) and next prime (12665138219).

It can be written as a sum of positive squares in only one way, i.e., 9675673225 + 2989464976 = 98365^2 + 54676^2 .

It is an emirp because it is prime and its reverse (10283156621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12665138201 - 2¹⁴ = 12665121817 is a prime.

It is not a weakly prime, because it can be changed into another prime (12665138231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332569100 + 6332569101.

It is an arithmetic number, because the mean of its divisors is an integer number (6332569101).

Almost surely, 2^12665138201 is an apocalyptic number.

It is an amenable number.

12665138201 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665138201 is an equidigital number, since it uses as much as digits as its factorization.

12665138201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 12665138201 in words is "twelve billion, six hundred sixty-five million, one hundred thirty-eight thousand, two hundred one".